I have less than 12 zwave devices included within Hubitat. When I run "Z wave Repair" it seems to go nowhere. The dialog showing text "Stage: Mapping Network. Refreshing node states".
My first attempt ran for over 2 hours before I aborted it. My next attempt has been running for an hour now and I will keep it running for at least 2 more hours.
It has been said in various other threads that with the latest z-wave firmware on the C7 hub, it is not necessary to do a full zwave repair. If you have an issue with a device, just do a repair on that device.
You've never said why you are trying the repair. Do you have an issue with one or more of your Z-Wave devices?
If you have battery powered devices that are showing not responding that is often normal for battery powered devices and majority of the time does not indicate there is a problem w/that device. Unless the battery powered device isn't working (e.g., contact sensor or motion sensors don't report being opened or sensing motion) then you should not do a Z-Wave repair to try to fix them.